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    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "Exception in Tkinter callback\n",
      "Traceback (most recent call last):\n",
      "  File \"c:\\Users\\lenovo\\AppData\\Local\\Programs\\Python\\Python311\\Lib\\tkinter\\__init__.py\", line 1967, in __call__\n",
      "    return self.func(*args)\n",
      "           ^^^^^^^^^^^^^^^^\n",
      "  File \"C:\\Users\\lenovo\\AppData\\Local\\Temp\\ipykernel_12360\\1867566369.py\", line 87, in login\n",
      "    tkinter.messagebox.showerror(title=\"警告\",\n",
      "  File \"c:\\Users\\lenovo\\AppData\\Local\\Programs\\Python\\Python311\\Lib\\tkinter\\messagebox.py\", line 98, in showerror\n",
      "    return _show(title, message, ERROR, OK, **options)\n",
      "           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n",
      "  File \"c:\\Users\\lenovo\\AppData\\Local\\Programs\\Python\\Python311\\Lib\\tkinter\\messagebox.py\", line 76, in _show\n",
      "    res = Message(**options).show()\n",
      "          ^^^^^^^^^^^^^^^^^^^^^^^^^\n",
      "  File \"c:\\Users\\lenovo\\AppData\\Local\\Programs\\Python\\Python311\\Lib\\tkinter\\commondialog.py\", line 45, in show\n",
      "    s = master.tk.call(self.command, *master._options(self.options))\n",
      "        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n",
      "KeyboardInterrupt\n"
     ]
    }
   ],
   "source": [
    "import tkinter\n",
    "import tkinter.messagebox\n",
    "import os\n",
    "import os.path\n",
    "\n",
    "path = os.getenv(\"temp\")\n",
    "filename = os.path.join(path, \"info.txt\")\n",
    "\n",
    "#创建应用程序窗口\n",
    "root = tkinter.Tk()\n",
    "#定义窗口大小\n",
    "root[\"height\"] = 140\n",
    "root[\"width\"] = 200\n",
    "\n",
    "#在窗口上创建标签组件\n",
    "labelName = tkinter.Label(root,\n",
    "                           text=\"User Name：\",\n",
    "                           justify=tkinter.RIGHT,\n",
    "                           anchor = \"e\",\n",
    "                           width = 80)\n",
    " #把组件放置到窗口上指定区域\n",
    "labelName.place(x=10,  y=5,  width=80,  height=20)\n",
    "\n",
    "#创建字符串变量和文本框组件，同时设置关联的变量\n",
    "#可以通过关联变量来读取或修改文本框内的文本\n",
    "varName = tkinter.StringVar(root, value=\"\")\n",
    "entryName = tkinter.Entry(root,\n",
    "                           width = 80,\n",
    "                           textvariable = varName)\n",
    "entryName.place(x=100,  y=5,  width=80,  height=20)\n",
    "\n",
    "labelpwd = tkinter.Label(root,\n",
    "                           text=\"User Pwd:\",\n",
    "                           justify=tkinter.RIGHT,\n",
    "                           anchor = \"e\",\n",
    "                           width = 80)\n",
    "labelpwd.place(x=10,  y=30,  width=80,  height=20)\n",
    "\n",
    "#创建密码文本框\n",
    "varPwd = tkinter.StringVar(root, value=\"\")\n",
    "entryPwd = tkinter.Entry(root,\n",
    "                            show=\"*\",         #不管输入什么，都显示为星号\n",
    "                            width = 80,\n",
    "                            textvariable = varPwd)\n",
    "entryPwd.place(x=100,  y=30,  width=80,  height=20)\n",
    "\n",
    "#尝试自动填写用户名和密码\n",
    "try:\n",
    "    with open(filename) as fp:\n",
    "        n,p = fp.read().strip().split(\",\")\n",
    "        name, pwd = info.split(\",\")\n",
    "        varName.set(n)\n",
    "        varPwd.set(p)\n",
    "except:\n",
    "    pass\n",
    "\n",
    "#记住我，复选框 \n",
    "rememberMe = tkinter.IntVar(root, value=1)      \n",
    "#选中时变量值为1，未选中时变量值为0，默认选中          \n",
    "checkRemember = tkinter.Checkbutton(root,\n",
    "                                        text=\"Remember me?\",\n",
    "                                        variable = rememberMe,\n",
    "                                        onvalue = 1,\n",
    "                                        offvalue = 0)\n",
    "checkRemember.place(x=30,  y=70,  width=120,  height=20)\n",
    "\n",
    "#登录按钮事件处理函数\n",
    "def login():\n",
    "    #获取用户名和密码\n",
    "    name = entryName.get()\n",
    "    pwd = entryPwd.get()\n",
    "    if name == \"admin\" and pwd == \"123456\":\n",
    "        tkinter.messagebox.showinfo(title=\"恭喜\", \n",
    "                                       message=\"登录成功！\")\n",
    "        \n",
    "        if rememberMe.get() == 1:\n",
    "            #把登录成功的信息写入临时文件\n",
    "            with open(filename, \"w\") as fp:\n",
    "                fp.write(\",\".join((name, pwd)))\n",
    "        else:\n",
    "            try:\n",
    "                #删除用于记录用户名和密码的临时文件\n",
    "                os.remove(filename)\n",
    "            except:\n",
    "                pass\n",
    "    else:\n",
    "        tkinter.messagebox.showerror(title=\"警告\", \n",
    "                                       message=\"用户名或密码错误\")\n",
    "#创建按钮组件，同时设置按钮事件处理函数\n",
    "buttonOk = tkinter.Button(root,\n",
    "                           text=\"Login\",     #设置按钮上显示的文本\n",
    "                           command = login)  #设置按钮的单击事件处理函数\n",
    "buttonOk.place(x=30,  y=100,  width=50,  height=20)\n",
    "\n",
    "#取消按钮的事件处理函数\n",
    "def cancel():\n",
    "    #清空用户输入的用户名和密码\n",
    "    varName.set(\"\")\n",
    "    varPwd.set(\"\")\n",
    "buttonCancel = tkinter.Button(root,\n",
    "                                 text=\"Cancel\",    \n",
    "                                 command = cancel)\n",
    "buttonCancel.place(x=90,  y=100,  width=50,  height=20)\n",
    "\n",
    "#启动消息循环\n",
    "root.mainloop()\n"
   ]
  }
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